42213639 has 16 divisors (see below), whose sum is σ = 60749024. Its totient is φ = 25920000.

The previous prime is 42213583. The next prime is 42213643. The reversal of 42213639 is 93631224.

It is not a de Polignac number, because 42213639 - 2⁷ = 42213511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42223639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22539 + ... + 24339.

It is an arithmetic number, because the mean of its divisors is an integer number (3796814).

Almost surely, 2^42213639 is an apocalyptic number.

42213639 is a deficient number, since it is larger than the sum of its proper divisors (18535385).

42213639 is a wasteful number, since it uses less digits than its factorization.

42213639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418.

The product of its digits is 7776, while the sum is 30.

The square root of 42213639 is about 6497.2023979556. The cubic root of 42213639 is about 348.1910448567.

The spelling of 42213639 in words is "forty-two million, two hundred thirteen thousand, six hundred thirty-nine".